Winding device for electrical machinery

ABSTRACT

Winding device for electrical machinery, namely for winding electric wire from a drum several times between winding frames through at least two holes of an iron core of the machinery, bonding an end portion of the wire wound on said winding frames, effecting the winding by rotating the frames, and detaching the wound wire on the core from the frames, wherein the device comprises at least two of the above-mentioned winding frames, provided with a mechanism for detaching the wound electric wire after it is wound on the iron core, through the two holes, and a motor-operated mechanism for rotating the frames.

[4 May 14, 1974 1 WINDING DEVICE FOR ELECTRICAL MACHINERY [75] Inventor:

[73] Assignee: Kabushiki Kaisha Meidensha,

Tokyo, Japan {22] Filed: Aug. 17, 1971 [21] Appl. No.: 172,413

Shohei Tsukajaki, Tokyo, Japan [30] Foreign Application Priority Data 3/1956 Bugg 242/1.1 A

3,000,580 9/1961 Matovich, Jr 242/4 A FOREIGN PATENTS OR APPLICATIONS 503,525 2/1929 Germany 242/4 A Primary Examiner-Billy S. Taylor Attorney, Agent, or Firm-Waters, Roditi, Schwartz & Nissen [57] ABSTRACT Winding device'for electrical machinery, namely for winding electric wire from a 'drum several times between winding frames through at least two holes of an iron core of the machinery, bonding an end portion of the wire wound on said winding frames, effecting the winding by rotating the frames, and detaching the wound wire on the core from the frames, wherein the device comprises at least two of the above-mentioned winding frames, provided with a mechanism for detaching the wound electric wire after it is wound on the iron core, through the two holes, and a motoroperated mechanism for rotating the frames.

3 Claims, 14 Drawing Figures PATEHEBW 14 m4 sum 2 or f m pw ax.

WINDING DEVICE FOR ELECTRICAL MACHINERY The present invention relates to a device for winding an electric wire on an iron core of an electrical machinery so as to constitute a closed magnetic circuit through at least two holes of the iron core.

In general, electrical machinery which has to constitute a closed magnetic circuit has a construction in which the electric wire is wound between at least two holes formed in an iron core. For example, a load cell having four holes is constructed in such a way that an exciting electric wire is wound between two holes of the iron core and a detecting electric wire is wound between the remaining two holes, whereby the mechanical stress impressed upon the iron core is electrically detected from the detecting winding when the iron core is excited by allowing an electric current to flow through the exciting winding.

Heretofore, when this type of electrical machinery was manufactured, and in order to wind the electric wire between each of the through holes of the iron core, a special tool was used, the electric wire was caused to pass through one of the through holes by manual operation, and then the same was caused to pass through the other hole, and this operation was repeated to complete the winding. Since the diameter of the through holes is small, there are drawbacks in that a large amount of operating time is required. Also the work is not only extremely difficult but also causes irregularities in the quality of the products, and therefore it is not possible to obtain uniform products, and furthermore they are not suitable for mass production, so that the products become expensive.

Also, heretofore, for applying the windings on the iron cores of rotors or stators of rotary electrical machinery, operations are required as bending a conductor and molding it to a coil, insulating the coil and inserting the coil in a plurality of axial grooves formed in the periphery of the iron core, and also driving a wedge into the grooves for preventing the jumping off of the coil after inserting the coil in the grooves. Accordingly a large amount of time is required for the winding of the electric wire, and also much difficulty is involved.

The present invention has improved the foregoing drawbacks, and its object is to provide a device with which the operating time required for winding the electric wire on the iron core of a static electrical machinery such as a saturable reactor or load cell, or a rotary electric machinery such as motor, can be shortened, the operation can be easily carried out, mass production is made possible and uniform quality products can be obtained at a low price.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view showing the construction in a first embodiment of the device for winding according to the present invention;

FIG. 2 is its side view;

FIG. 3 is a vertical side view ofa wound electric wire portion;

FIG. 4 is a front view showing the construction in a second embodiment of the device for winding according to the present invention;

FIG. 5 is an end view taken along line V V of FIG.

FIG. 6 is a partly sectional view taken along line VI VI of FIG. 4;

FIG. 7 is a similar view taken along line Vll VII of FIG. 4;

FIG. 8 is an enlarged detail side view of a part of FIG.

FIG. 9 is a plan view corresponding to FIG. 4;

FIG. 10 is a frontal, partly sectional view of part of FIG. 4;

FIG. 11 is a side view of FIG. 10;

FIG. 12 is a front view showing an example of an iron core on which the electric wire is wound by the device of the present invention;

FIG. 13 is a front view showing a stator formed by winding the electric wire on. the iron core of FIG. 12; and

FIG. 14 is a vertical side view of FIG. 13.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will'be described by referring to the accompanying drawings. A first embodiment relating to the device for winding in accordance with the present invention, as shown in FIGS. 1 and 2, comprises steps of mounting electric wire 76 from a wire drum 26 on a guide wheel 34 (wheels 35 to 37 to be described somewhat later), causing this wire 76 to pass a through hole 77 located in the upper portion of an iron core 74 from the upper side of the grooves of a winding frame 12 (frames 10, 11 and 13 to be described somewhat later), causing it to pass through another hole 77 located in the lower portion by being made to follow the upper side of the grooves of another winding frame 10, winding the electric wire several times, for example twice along the lower side of the frame 12, bonding a wire end portion 76 on the wound wire 76 by employing a bonding agent such as Aron Alfa, cutting off its end, effecting the winding of the wire through the holes 77, 77' on the frames l0, 12, using end portion 76' as a base point by rotating both frames l0, 12 by means of a motor operated mechanism (not shown in the drawing), stopping the mechanism when a desired number of windings is completed, and cutting the electric wire to complete the winding operation.

Thereafter, the electric wire wound on the iron core 74 may be detached from the frames 10, 12. This detachment can be carried out by arranging the frames l0, 12 with a disassembable construction, for example as shown in FIG. 3. Namely, both frames l0, 12 are constructed in such a way that short hollow shafts 81a, 81b are rotatably pivotally fixed on two mutually opposed bearing supporters 79a, 79b by means of ball bearings 80a, 80b, and the shafts 81a, 81b are arranged to be rotated by means of the motor operated mechanism which is connected to V-pulleys 82a, 82b, integral with shafts 81a, 81b through a V-belt 83. The motor operated mechanism includes the common V-pulley 82a, as shown in FIG. 1, and a pulley 85 fixed to one end of an intermediate shaft 84 which is driven by a motor and disposed downwards from the base frame 1. The other motor operated mechanism for the V-pulley 82b is similarly built. A common bolt shaft 87, having a threaded portion 86 at its end, is inserted in and supported on the hollow shafts 81a, 81b.

Two portions 10a, 10b and 12a, 12b, constituting the winding frames 10, 12 through collars 88a, 88b, are indetached from frames l0, 12, the nut 89 is removed" from the shaft 87 and the same is pulled out for disas sembly; then each frame 10, 12 is disassembled into the two portions a, 10b and 12a, 12b, whereupon the wound electric wire can be separated therefrom.

The device for winding of the second embodiment in the present invention comprises steps of holding .the iron core on a supporting body supported on a rotary supporting portion, making both winding frames to be of a construction in which their interval can be changed or adjusted, effecting the winding of the electric wire initially to at least two through holes of the iron core, thereafter reducing the interval between the frames to detach the wound wire therefrom, rotating the holding body by a fixed angle, setting the iron core to a position where the electric wire is wound between at least the next two through holes, and removing the iron core from the supporting body. by rotating the supporting portion when the winding of the electric wire to all the through holes is completed as explained in the forego- The construction of to the second embodiment will be now described in detail by referring to FIGS. 4 to 9. Reference numeral 1 is an angle frame, 2, 2 are two threaded shafts which are transversely supported on the frame 1 on the same straight line by bearings 3, 3', and their head portions are fixed with handles 4, 4' for rotatably operating the head portions.

Reference numerals 5, 6 show two bearing stands which are provided with respective threaded holes. The bearing stands 5, 6 have complimentarily threaded shafts 2, 2 inserted therein, which can be shifted oppositely axially of the shaft along a guide 7 by rotating the shafts 2, 2' in opposite directions to adjust the interval between the bearing stands 5, 6 and similarly between winding frames 10,12 and l1, 13, to be described hereunder. However, one common threaded shaft may be employed to shift the bearing stands 5, 6 in opposed directions axially of the shaftby rotating the latter if the bearing stands 5, 6 have oppositely threaded holes, complementary to the threaded shaft, and thus the interval between the respective stands 5, 6 may be enlarged or reduced by the rotational direction of the threaded shaft.

Reference numerals 8, 9 are winding shafts which are transversely supported in mutual opposition by the respective stands 5, 6, while 10, 11 and l2, 13 are the winding frames, mounted on both ends of the respective shafts 8, 9.

Reference numerals 14, 15 are rotary supporting portions (refer to FIGS. 7, l0 and l l) which are rotatably placed in the outside of the frame 1 and being eccentrically disposed by pivotable shafts 16, 17 on the frame 1 between the opposed frames l0, l2 and 11, 13. Each supporting portion 14, 15 is arranged to be rotatable until rotation limiting edges 14', 15 abut an upper surface 1 on the frame I.

As FIGS. 7, 9 and 11 show, 18, 19 are iron core supporting bodies which are rotatably supported on the respective supporting portions l4, 15 by means of bearings 20, 21, and holes 22, 23 are formed in the centers of bodies 18, 19 and axially extending keys 24, 25, provided in internal surfaces of the respective holes 22, 23. Since the pivoting shafts 16, 17 of supporting portions 14, 15 are eccentric to the centers of the respective supporting bodies 18, 19, they are stabilized without being fixed to the frame 1, but in order to prevent offset, completely, the mere clamping with the bolt suffices.

As shown in FIGS. 4, 5, and 9, 26 to 29 are electric wire drums in which their shafts 32, 33 are transversely 7 supported by means of bearing stands 30, 31 on the frame 1. Numerals 34 to 37 are electric wire guide wheels in which their shafts 42 to 45 are transversely supported on the frame 1 by means of bearing stands 38 to 41. Numerals 46 to 47 designate respectively a motor for driving the winding frame shaft, and a reduction gear, which are fitted on the frame 1. The respective shafts 8, 9 are arranged to be rotated by means of the motor 46 through the gear 47 and by first and second rotation transmitting mechanisms.

The first rotation transmitting mechanism is, for example, composed of a sprocket 48 mounted on the reduction gear 47, a sprocket 51 fixed to an intermediate shaft 50 which is supported by a bearing 49, and a chain 52 which is suspended on the sprockets.

The second rotation transmitting mechanism is, for example, composed of a pulley 53 fixed to the intermediate shaft 50, a pulley 54 fixed to the respective winding frame shafts 8, 9, and a V-belt 55 mounted on pulleys.

As shown in FIGS. 4, 7, 10 and 11, numerals 56, 57 designate motors for indexing the supporting bodies l8, 19 which latter are, for example, composed of pulleys 58, 59 formed integrally on the bodies 18, 19, pulleys 62, 63 which are supported by shafts 60, 61 by means of the respective supporting portions 14, 15, pulleys 66, 67 fixed to rotary shafts 64, 65 of the respective motors 56, 57, and V-belts 68, 69 which are suspended on the pulleys; the holding bodies are arranged to be rotated by a fixed angle at a time.

Also, the construction of the motor operated mechanism for driving the winding frames 10 to 13, and of the mechanism for rotating the holding bodies 18, 19 by a fixed angle at a time, may be of any type as long as it can achieve the object, and is not particularly limited, and therefore it is omitted in the drawings, but, for example, the following construction may be employed. The motor operated mechanism for driving the winding frames 10 to 13 may be composed of the motor 46, a mechanism for transmitting the rotation thereof to winding frame shafts 8, 9, an actuating switch of the motor 46, a relay which holds itself through the actuating switch and connects a power source to the motor 46, and a counter which sets the desired number of windings and breaks a relay circuit when the set number of windings is reached.

The motor operated mechanism for rotating the holding bodies 18, 19 by a fixed angle at a time may, in turn, be composed of motors 56, 57, a mechanism for transmitting rotation to the holding bodies 18, 19, an actuating switch for the motors 56, 57, each with a relay which holds itself by way of the respective actuating switch and which connects a power source to the respective motor, limit switches 70, 71 (refer to FIG. 10) provided so as to cause their contactors to contact, for example, the side faces of-the pulleys 58, 59 in order to limit the rotation of the respective motors 56, 57, and depressions 72, 73 (refer to FIG. 11) formed on the side faces of the pulleys 58, 59 by a fixed angle for individually breaking the limit switches.

Now the case will be explained where electric wire is to be wound on an iron core 74 of a stator rotary electrical machinery (the core being similar to that shown in FIG. 1 at 74'), for example, as shown in FIG. 12 by means of a winding device according to the present invention having the foregoing construction.

First of all, the respective supporting portions 14, are swung in respective counter clockwise and clockwise directions at right angles with respect to the winding direction in FIG. 7, with each pivoting shaft l6, 17 as the center, until they abut the upper surface 1' of the frame 1. In this condition, the iron core 74 is inserted and held in the holes 22, 23 of the supporting bodies 18, 19 so that the axial grooves 75 on the periphery of the iron core can be fitted to the keys 24, 25 of the respective bodies l8, 19. Then the latter are caused to resume their original position (as shown in FIGS. 7, 11).

In the second embodiment, the frames 10, 11 and l2, 13 are provided on both ends of the respective shafts 8, 9 and also the case is known where the electric wires are wound simultaneously on two iron cores.

However, when the frames are fitted on the shafts 8, 9, and also when a desired number of winding frames is fitted, it will be obvious that the winding of electric wires can be effected as explained. Accordingly, for facilitating an easier explanation, the case will be described where the electric wires are wound on an iron core by using only two frames (e.g. 10, 12).

After the iron core 74 on the holding body 18, the shafts 2, 2' are caused to rotate in opposite directions by means of handles 4, 4', and the interval between the bearing stands 5 6, and moreover the interval between the frames 10, 12, is adjusted according to the size of the electric wire to be wound on the iron core 74.

The respective wires 76 are drawn from the drums 26, 27 and they are inserted sequentially in the respective grooves of the guide wheels 34, 35. The wires 76 are then caused to pass through two holes 77 in the upper part of the iron core 74 on the upper side of the respective grooves of the frame 12, and then the wires are caused to travel along the upper side of the respective grooves of the frame 10 and to pass through two holes 77' in the lower part of the lower side, to travel along the lower side of the frame 12 and to be wound several times, for example, twice.

Thereafter the end portions 76' (see FIG. 1) of the wires 76, preferably are bonded (e.g. soldered or welded) to the wound electric wires 76 by employing a bonding agent such as Aron Alfa, as suggested before, and the end portions are cut off; then the rotating motor 46 is driven and thus the winding frames 10, 12 are made to rotate.

The electric wires are caused to pass through the holes 77, 77 between the frames l0, 12, with the end portions 76' as the base point, namely by rotation of the winding frames l0, 12. Then the motor 46 is stopped, when the winding of the desired number of wire turns is completed, the wires are cut, and thus the winding of two wires is completed. Thereafter, the shafts 2, 2' are caused to rotate in opposite directions by means of the handles 4, 4' to reduce the interval between the frames 10, 12, and thus the wires can be detached from the winding frames l0, l2.

tric wire or winding 78 is removed, with the iron core,

from the frames l0, 12, both exposed end portions of a coil produced by the wire 78 are bent substantially radially outwardly in the form of an are as shown in FIGS. l3, l4, and then the indexing motor 56 is driven to rotate the holding body 18.

When the holding body 18 is rotated and the movable element of the limit switch is disengaged from the depression 72, the switch 70 is closed to continue the rotation of the motor 56 even though the finger of limit switches 70, 71 is separated from an actuating switch (not shown).

When the holding body 18 is angularly rotated for a fixed angle, such as angle of FIG. 12, the movable element of the switch 70 drops into the depression 72, and thus the motor 56 is stopped, and also the supporting body 18 stops.

The sequential winding of the wire can be effected by the method described in the foregoing, and when the winding to all the holes is complete, the supporting portion 14 is caused to rotate in the counterclockwise direction in FIG. 2, using the shaft 16 as the center, and the iron core 74 on which the wire is wound is pulled out from the holding body 18, whereby a completed stator is provided, having the wound electric wires thereon.

As it is obvious from the foregoing detailed description of the various embodiments, the present invention provides a device suitable for winding electric wire on iron cores of electric machinery which has to constitute a closed magnetic circuit such as a saturable reactor, load cell or rotary electric machinery, and has the effects of shortening the operating time, simplifying the operations as well as making mass production possible and to provide uniform quality products at a low price through the elimination of irregular products, as the electric wire can be wound by inventive electrically operated device after initially making a few windings by manual work.

It should be noted that the present invention is not limited to the described embodiments and can be put to work by changing the number of winding frames, grooves of the frames, and wire drums, and by modifying the embodiments of the device to a certain extent, or that can be easily conceived therefrom within the technical scope of the present invention.

What is claimed is:

l. A winding device for electrical machinery, comprising wire supply means (26), at least two rotatably mounted, oppositely disposed winding frames (10,12), a mechanism (34, 35) for winding electric wire (76) from said supply means on an iron core (74) of the machinery through at least two holes (77, 77 at a time, each hole being disposed at an end of said core, at least one pair of winding-frame support members (5, 6), means (2, 3, 4) for adjusting the interval between said frames, at least two iron-core supporting bodies (18) carried by a rotatable supporting portion (14) located between said frames, and drive means for rotating said bodies by a fixed angle at a time to a position in which said holes come into alignment with said frames, wherein said drive means includes at least one motor (64) for indexing said bodies, a mechanism (66, 68, 62) for transmitting the rotation of said motor to said bodies, at least one limiting switch (70) to cause to touch a side face of said bodies by a respective contactor in order to limit the rotation of said motor, and depressions (72) formed on said side face for operating said limiting switch.

2. The winding device as defined in claim 1, wherein each of said frames (10, 12) includes two bearing sustaining bodies (79a, b) facing each other, two hollow shafts (81a, b) pivotably supported by said sustaining bodies, pulley means (82a, b) integral with one of said hollow shafts, two hollow members (10a, 12) axially aligned with and between the latter, said hollow members serving to guide, along the circumference thereof,

edge (14'), secured and eccentrically disposed by a pivotable shaft (36) on a base frame (1), between said winding frames (10, 12) and arranged to be rotatable until said limiting edge abuts an upper surface (I') of said base frame, said supporting bodies (18) being rotatably supported on said supporting portion by means of a bearing (20) and having a hole (22) formed in their central portion, and at least one key (24) of an axial direction provided in said hole. 

1. A winding device for electrical machinery, comprising wire supply means (26), at least two rotatably mounted, oppositely disposed winding frames (10,12), a mechanism (34, 35) for winding electric wire (76) from said supply means on an iron core (74) of the machinery through at least two holes (77, 77'') at a time, each hole being disposed at an end of said core, at least one pair of winding-frame support members (5, 6), means (2, 3, 4) for adjusting the interval between said frames, at least two ironcore supporting bodies (18) carried by a rotatable supporting portion (14) located between said frames, and drive means for rotating said bodies by a fixed angle at a time to a position in which said holes come into alignment with said frames, wherein said drive means includes at least one motor (64) for indexing said bodies, a mechanism (66, 68, 62) for transmitting the rotation of said motor to said bodies, at least one limiting switch (70) to cause to touch a side face of said bodies by a respective contactor in order to limit the rotation of said motor, and depressions (72) formed on said side face for operating said limiting switch.
 2. The winding device as defined in claim 1, wherein each of said frames (10, 12) includes two bearing sustaining bodies (79a, b) facing each other, two hollow shafts (81a, b) pivotably supported by said sustaining bodies, pulley means (82a, b) integral with one of said hollow shafts, two hollow members (10a, b) axially aligned with and between the latter, said hollow members serving to guide, along the circumference thereof, the electric wire (76) to be wound on said core (74''), a bolt shaft (87) provided with a threaded portion (86) at its end and being insertable through said hollow shafts and said hollow members, disposed between said hollow shafts when aligned in a straight line, and a securing nut (89) connected to said threaded portion of the bolt shaft.
 3. The winding device as defined in claim 1, wherein said supporting portion (14) has a rotation limiting edge (14''), secured and eccentrically disposed by a pivotable shaft (16) on a base frame (1), between said winding frames (10, 12) and arranged to be rotatable until said limiting edge abuts an upper surface (1'') of said base frame, said supporting bodies (18) being rotatably supported on said supporting portion by means of a bearing (20) and having a hole (22) formed in their central portion, and at least one key (24) of an axial direction provided in said hole. 